Unfortunately the used Gasgas market is a tough sell. Several factors should go into setting price and selling a used Gasgas.
Location: Some parts of the country seem to hold a higher value on used bikes compared to others.
Aftermarket items: although you'll never get your full $ back, a nicely equipped bike will sell better and go for a higher price. Things like bark busters, guards, computers, etc are nice features that some will pay a little extra for.
Overall condition and cleanliness: I've always been blown away when I go to look at a "meticulously maintained" bike and you arrive to find a filthy clapped out bike. Anyone who takes the time to thoroughly clean and detail their bike is someone who cared for it and will have a high probability of selling their bike. Scratched plastics are always an expectation on a used bike, but bent rims, missing spokes, crushed pipes, bent rotors, broken levers, etc are all big red flags.
Targeting the right market: there are quite a few guys out there who are in the used Gasgas market, but not many of them. Placing an ad on here as well as Craigslist and your local ads is a great place to start. Other options are cycle trader and some of the other national buy/sell venues. You also have to decide if you're willing to ship or not. With a used Gasgas, you might have to keep that option open. I always try to remember I'm probably targeting an older guy whose a woods rider, not a 20 year old metal mulisha wearing knob.
A good descriptive ad with good pics: always makes a difference. Shows you know what you're talking about and care about what you're selling and are serious. I never even consider an ad with crappy pics or "nice bike" as the description.
Patience: you're selling a used Gasgas. If you're patient the right buyer will come along.
Hope this helps. I've sold 2 used Gasgas and bought 4 used Gasgas along with many other used bikes.
I would say around $2500 is in the ball park
Good luck
